shell script trap functions

include.sh

# Debugging tools. REMOVE THIS LATER. {{{1
set -o errexit  # exit on errors
set -o nounset  # exit on use of uninitialized variable
set -o errtrace # inherits trap on ERR in function and subshell

trap 'traperror $? $LINENO $BASH_LINENO "$BASH_COMMAND" $(printf "::%s" ${FUNCNAME[@]:-})' ERR
trap 'trapexit $? $LINENO' EXIT

trapexit() {
  log "EXIT on line $2 (exit status $1)" "INFO "
}

traperror () {
  local err=$1  # error status
  local line=$2  # LINENO
  local linecallfunc=$3
  local command="$4"
  local funcstack="$5"

  log "'$command' failed at line $line - exited with status: $err" "ERROR"

  if [ "$funcstack" != "::" ]; then
    message="Error in $funcstack"
    if [ "$linecallfunc" != "" ]; then
      message="$message called at line $linecallfunc"
    fi
    log "$message" "DEBUG"
  fi

}

log() {
  local msg=$1
  local level="${2:-INFO}"
  now=$(date "+%Y-%m-%d %H:%M:%S%z")
  echo "$now $(hostname) $0:$level $msg" 1>&2
}
# End debugging tools. 1}}}